By using a 64 GB test file in AJA System Test, I can ensure that I are not just writing to the file system cache or the faster cache chips on the NVMe blades. So with a RAID 0 volume using 4 of these blades, the first 8 – 16 GB might be going into the cache on the blade. The size of these caches is usually 2 – 4 GB. In addition, many NVMe blades use DRAM caches or SLC flash as a type of cache (SLC flash is much faster than TLC). If I then run AJA System Test with a 64 GB test file, I know for certain that the file cannot reside entirely in the macOS file system cache, there just isn’t enough physical RAM. If I use a Mac with this size RAM, I know that there is no more than 4 – 6 GB available for file system cache. Tim Responds: Unlike most video professionals, I tend to use Macs with smaller amounts of RAM (e.g. I sent them to OWC, BMD and AJA for evaluation and all three companies are looking into this further. When I read Tim’s comment, I went back and re-ran all my tests using AJA System Test (full version).
Owc softraid xt full version#
He is using the full version of AJA System Test and not the Lite version available on Apple’s Mac App Store.įollow-up comment from Larry: The AJA System Test (full version) is available from the AJA website. Here is our conversation.Īt the start of his interview, Tim noted that when he discusses speed numbers in this conversation, he’s using AJA System Test with a 64 GB test file, file system cache disabled and 16 bit RGBA codec.
Owc softraid xt software#
To learn more, I emailed a series of questions to Tim Standing, VP of Software Development at OWC. It is currently not possible to know with any assurance that the test results we see are accurate. NOTE: For example, this article describes the challenges in measuring storage performance using Blackmagic Design vs. What I discovered is that storage “performance,” that is the speed our storage transfers data, is surprisingly variable and complex. I looked at single hard drives, servers and, now SSDs and RAIDs.
Just make sure to tag the post with the flair and give a little background info/context.For the last several weeks, I’ve explored just how fast our storage actually is. On Fridays we'll allow posts that don't normally fit in the usual data-hoarding theme, including posts that would usually be removed by rule 4: “No memes or 'look at this '” We are not your personal archival army.No unapproved sale threads, advertisement posts, or giveaways.
Owc softraid xt free#
No memes or 'look at this old storage medium/ connection speed/purchase' (except on Free Post Fridays).Search the Internet, this subreddit and our wiki before posting.And we're trying really hard not to forget.ģ.3v Pin Reset Directions :D / Alt Imgur link Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Timetm). government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Among us are represented the various reasons to keep data - legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g.
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